/* 引入图标  注意路径变化*/
@font-face {
    font-family: 'icomoon';
    src: url('../fonts/icomoon.eot?hav3n6');
    src: url('../fonts/icomoon.eot?hav3n6#iefix') format('embedded-opentype'),
        url('../fonts/icomoon.ttf?hav3n6') format('truetype'),
        url('../fonts/icomoon.woff?hav3n6') format('woff'),
        url('../fonts/icomoon.svg?hav3n6#icomoon') format('svg');
    font-weight: normal;
    font-style: normal;
    font-display: block;
}

.back {
    position: relative;
    width: 100%;
    height: 720px;
}

.back::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, .5);
}

.back_img {
    position: absolute;
    top: 0;
    left: 0;
    z-index: -1;
    width: 100%;
    height: 720px;
    overflow: hidden;
}

.back_img ul {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 500%;
}

.back_img ul li {
    float: left;
    width: 20%;
    height: 100%;
}

.back_img ul li img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* nav导航栏部分 */
.h-nav {
    position: relative;
    z-index: 999;
    width: 100%;
    height: 72px;
}

.g-nav {
    z-index: 999;
    background-color: #FFF;
}

.nav {
    position: relative;
    margin: 0 auto;
    width: 1200px;
    height: 72px;
}

/* 下拉白栏模块 */
.whiteboard {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 500;
    height: 450px;
    width: 100%;
    background-color: #FFF;
}

/* logo部分 */
.logo a {
    position: absolute;
    left: 0;
    top: 25px;
    z-index: 999;
    display: block;
    width: 168px;
    height: 22px;
    background-image: url(../images/index/menu_logo.png);
    background-size: 100% 100%;
}

/* 快捷导航栏部分 */
.shortcut {
    position: absolute;
    right: 160px;
    top: 0;
    z-index: 999;
    cursor: pointer;
}

.g-nav .logo a,
.shortcut:hover~.logo a {
    background-size: 100% 100%;
    background-image: url(../images/index/menu_logo_hover.png);
}

.g-nav .shortcut .menu a,
.g-nav .language-area a,
.shortcut:hover~.language-area a,
.shortcut:hover .menu_list,
.shortcut .menu .show_list li a:hover {
    color: #2b2e2b;
}

.shortcut .menu .show_list li a {
    color: #737375;
}

.menu>li {
    position: relative;
    top: 0;
    left: 0;
    /* 对于二级菜单定位 */
    float: left;
    /* height: 72px; */
    margin-left: 72px;
}

.menu>li>a {
    display: block;
    /* 改变高宽 */
    position: relative;
    /* 对于蓝色下划线定位 */
    /* height: 72px; */
    line-height: 72px;
    font-size: 16px;
    font-weight: 700;
}

.menu>li>a::after {
    display: block;
    visibility: hidden;
    content: '';
    position: absolute;
    bottom: 19px;
    left: 50%;
    height: 4px;
    background-color: #194ac3;
}

@keyframes bottom {
    0% {
        width: 0%;
    }

    100% {
        width: 100%;
        /* position: absolute; */
        left: 0;
    }
}

.menu>li:hover .show_list {
    display: block;
}

.menu>li:hover a::after {
    animation-name: bottom;
    animation-duration: 0.2s;
    animation-fill-mode: forwards;
    visibility: visible;
}

.show_list {
    display: none;
    position: absolute;
    top: 72px;
    left: -80px;
    z-index: 999;
    width: 190px;
    background-color: #fff;
}

.show_list>li {
    padding: 13px;
    text-align: center;
}

.show_list>li>a {
    font-size: 16px;
    color: #2b2e2b;
}

/* 语言切换模块 */
.language-area {
    position: absolute;
    top: 25px;
    right: 0;
    z-index: 999;
    color: #fff;
    font-size: 16px;
}

.divide {
    margin: 0 3px;
    font-style: italic;
}

/* nav导航栏部分结束 */

/* banner部分开始 */
/* 标题部分 */
.banner_title {
    position: absolute;
    top: 240px;
    width: 100%;
    z-index: 0;
    cursor: pointer;
}

.banner_title h1,
.banner_title h5 {
    margin: 12px auto;
    font-weight: normal;
    color: #fff;
}

.banner_title h1 {
    font-size: 48px;
}

.banner_title h5 {
    font-size: 18px;
}

/* 图标部分 */
.banner_icon {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    position: absolute;
    bottom: 120px;
    left: 50%;
    padding-bottom: 24px;
    transform: translateX(-50%);
}

/* 箭头部分 */
/* .arrowhead {
    float: left;
} */

.arrowhead span {
    display: inline-block;
    height: 30px;
    width: 54px;
    margin: 0 10px;
    cursor: pointer;
    background-size: 100% 50%;
}

.arrowhead_left {
    background: url(../images/banner/icon_arrow_r.png) no-repeat;
    transform: rotateY(180deg);
}

.arrowhead_right {
    background: url(../images/banner/icon_arrow_r.png) no-repeat;
}

/* 圆点部分 */
.banner_dots {
    display: flex;
}

.dots {
    display: flex;
    width: 86px;
    height: 21px;
    padding-top: 10px;
}

.banner_dots span,
.dots span {
    display: inline-block;
    margin-left: 12px;
    width: 10px;
    height: 10px;
    background-color: #fff;
    cursor: pointer;
}

.banner_dots .current,
/* .dots span:nth-child(n):active */
.dots .cur_dots {
    width: 30px;
    background-color: rgb(0, 82, 217);
}

/* banner部分结束 */


/* 头部部分开始 */
.news_update {
    position: relative;
    /* 不使用定位会被背景图片掩盖 */
    margin-top: -120px;
    padding-bottom: 60px;
}

.content h4 {
    width: 100%;
    margin-bottom: 12px;
    padding-top: 12px;
    border-top: 1px solid #FFF;
    font: italic 700 28px "TencentSansW7CN";
    /* font-weight: 500;
    font-size: 28px;
    font-family: TencentSansW7CN; */
    color: #FFF;
}

.module_first,
.firstline,
.firstline_one_img,
/* 图片超出部分隐藏 */
.firstline_two,
.firstline_three_img .firstline_four {
    display: flex;
    justify-self: flex-start;
    align-self: flex-start;
    flex-wrap: wrap;
}

/* 第一列 */
.firstline {
    width: 65%;
}

/* 左列第一个 */
.firstline_one,
.two_right,
.firstline_three {
    background-color: #FFF;
}

.firstline_one:hover,
.two_left:hover,
.two_right:hover,
.firstline_three:hover,
.firstline_four:hover,
.secondline_two:hover,
.secondline_three:hover,
.secondline_four:hover {
    transform: translateY(-3px);
    box-shadow: 2px 4px 3px rgb(226, 225, 225);
}

.firstline_one_img,
.two_left_img,
.two_right_img,
.firstline_three_img,
.firstline_four_img,
.secondline_one_img,
.secondline_two_img,
.secondline_three_img,
.secondline_four,
.introduction1,
.introduction2,
.introduction3 {
    overflow: hidden;
}

.firstline_one_img img {
    display: block;
    width: 100%;
    height: 70%;
}

.firstline_one_img img:hover,
.two_left_img img:hover,
.two_right_img img:hover,
.firstline_three_img img:hover,
.firstline_four:hover img,
.secondline_one_img img:hover,
.secondline_two_img img:hover,
.secondline_three_img img:hover,
.secondline_four:hover img,
.introduction1:hover img,
.introduction2:hover img,
.introduction3:hover img {
    animation-name: slow;
    animation-duration: 0.5s;
    animation-fill-mode: forwards;
}

@keyframes slow {
    0% {}

    100% {
        transform: scale(1.05, 1.05);
    }
}

.firstline_one_card {
    margin-top: -150px;
    padding: 36px 0;
}

.firstline_one_card a:hover h3,
.two_right_card a:hover h3,
.firstline_three_card a:hover h3 {
    color: #0052D9;
}

.firstline_one_card h3,
.firstline_one_card p,
.two_right_card h3,
.two_right_card p,
.firstline_three_card h3,
.firstline_three_card p,
.secondline_two_card h3,
.secondline_two_card p {
    color: #2B2B2E;
}

.firstline_one_card h3,
.two_left_card h3,
.two_right_card h3,
.firstline_three_card h3,
.firstline_four_card h3,
.secondline_one_card h3,
.secondline_two_card h3,
.secondline_three_card h3,
.secondline_four h3 {
    font-size: 24px;
    font-weight: normal;
    line-height: 1.4em;
    margin: 12px 24px;
}

.firstline_one_card p,
.two_left_card p,
.two_right_card p,
.firstline_three_card p,
.secondline_one_card p,
.secondline_two_card p,
.secondline_three_card p {
    font-size: 16px;
    margin: 12px 24px;
    padding: 12px 0;
}

/* 左列第二个左边 */
.firstline_two {
    margin: 24px 0;
}

.two_left {
    width: 370px;
    background-color: #0052D9;
    color: #FFF;
}

.two_left_img img,
.two_right_img img {
    width: 100%;
}

.two_left_card,
.two_right_card {
    width: 370px;
    height: 347px;
    padding: 36px 0;
    margin-bottom: 35px;
}

.two_left_card span,
.two_left_card span::before,
.two_left_card span::after {
    content: '';
    border-top: 1px solid #FFF;
    color: #FFF;
}

/* 左列第二个右边 */
.two_right {
    margin-left: 30px;
    width: 370px;
}

/* 左列第三个 */
.firstline_three {
    height: 550px;
}

.firstline_three_img {
    display: block;
    height: 50%;
}

.firstline_three_card {
    padding: 36px 0;
}

/* 左列第四个 */
.firstline_four {
    margin-top: 24px;
}

.firstline_four {
    position: relative;
    width: 99%;
    height: 315px;
}

.firstline_four_img {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.firstline_four_img img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.ff_img_shadow {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: linear-gradient(90deg, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0) 100%);
}

.firstline_four_card {
    position: absolute;
    top: 30%;
    padding: 0 56px;
    width: 660px;
    z-index: 2;
}

.firstline_four_card p {
    font-size: 16px;
    margin: 12px 24px;
}

/* 第二列 */
.secondline {
    width: 34%;
    margin-left: 10px;
}

/* 第二列第一个 */
.secondline_one {
    background-color: rgb(0, 169, 206);
}

.secondline_one_img img {
    width: 100%;
    height: 100%;
}

.secondline_one:hover {
    transform: translateY(-3px);
}

.secondline_one_card {
    padding: 56px 0 63px 0;
}

.secondline_one_card span,
.secondline_one_card span::before,
.secondline_one_card span::after {
    content: '';
    border-top: 1px solid #FFF;
    color: #FFF;
}

/* 第二列第二个 */
.secondline_two {
    background: #D8D7DF;
    margin: 25px 0;
    padding-bottom: 30px;
}

.secondline_two_img {
    height: 250px;
}

.secondline_two_img img {
    width: 100%;
    height: 100%;
}

.secondline_two_card {
    height: 347px;
    padding: 36px 0;
}

/* 第二列第三个 */
.secondline_three {
    background: #0052d9;
    padding-bottom: 20px;
}

.secondline_three_img img {
    width: 100%;
    height: 230px;
}

.secondline_three_card {
    padding-top: 36px;
    height: 300px;
}

.secondline_three_card span,
.secondline_three_card span::before,
.secondline_three_card span::after {
    content: '';
    border-top: 1px solid #FFF;
    color: #FFF;
}

/* 第二列第四个 */

.secondline_four {
    position: relative;
    margin-top: 25px;
    height: 315px;
    width: 100%;
}

.secondline_four img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.secondline_four h3 {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
}

.secondline_four .four_vedio {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -30%);
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background-color: rgba(25, 74, 195, 0.95);
}

.secondline_four .four_vedio::after {
    content: '';
    display: block;
    position: absolute;
    top: 32%;
    left: 47%;
    z-index: 1;
    transform: scaleY(0.7);
    border-width: 12px;
    border-style: solid;
    border-color: transparent transparent transparent #FFF;
}

.secondline_four:hover .four_vedio {
    background-color: #FFF;
}

.secondline_four:hover .four_vedio::after {
    border-color: transparent transparent transparent rgba(25, 74, 195, 0.95);
}

.secondline_four video {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* z-index: -1; */
    object-fit: cover;
}

.secondline_four:visited .four_words {
    display: none;
}

.secondline_four:visited .four_vedio {
    display: none;
}